The next step is to find the reflections (\(E_{r,\parallel },E_{r,\perp }\) ) and transmissions (\(E_{t,\parallel },E_{t,\perp }\) ) coefficients outside the chiral slab. For this purpose, the incident electric
and magnetic fields defined in Eqs. (REF )-(REF ), together with expressions for the electromagnetic field inside the chiral slab, obtained by [1]}, can further be written in different regions by applying the appropriate boundary conditions. For instance, one can define: (i) the reflected and transmitted fields inside the host medium and inside the chiral slab, respectively, at \(z=0\) , (ii) the reflected and transmitted fields inside the slab and inside the surrounding medium at \(z=d\) , respectively. This is simple but lengthy process and the all calculations are rigorously presented in the Ref. [1]}. By following the same procedure we come up with eight equations and eight variables.
